1) Design

Related Risks

D1) Design errors and omissions

D2) Design process takes longer than anticipated

D3) Stakeholders request late changes

D4) Failure to carry out the works based on the contract

2) Construction

Related Risks

C1) Cave-ins or excavation collapses

C2) Construction equipment failures

C3) Falling of excavated material

C4) Changing conditions – strata and stress field fluctuations

C5) Tunnel instability – rock or earth falls and rock bursts

C6) High noise levels and vibration and dust

C7) Excessive seepage and ground water inflow

C8) Fire or explosion problem

3) Project

Management

Risks

M1) Failure to comply with contractual quality Requirements

M2) contractor delays,

M3) Scheduling errors

M4) Project team conflicts

4) Environmental

Related Risks

En1) Environmental analysis incomplete

En2) Air contamination or oxygen depletion

En3) Incomplete environmental analysis

5) Right of way Risks

R1) Improper & delay in resettlement of the land owners

R2) Conflict with the land owners

6) Organization

Related Risk

O1) Inexperienced workforce and staff turnover

O2) Delayed deliveries

O3) Lack of protection on a construction site

7) External

Factors Risks

Ex1) New stakeholders emerge and request changes

Ex2) Public objections/challenges

Ex3) Laws and local standards change

Ex4) Tax change

Ex5) Construction cost increasing